Question

A cave rescue team lifts an injured spelunker directly upward
andout of a sinkhole by means of a motor-driven cable. The lift
isperformed in three stages, each requiring a vertical distance
of15.0 m: (a) the initially stationaryspelunker is
accelerated to a speed of 3.30m/s; (b) he is then
lifted at theconstant speed of 3.30 m/s; (c)
finallyhe is decelerated to zero speed. How much work is done on
the 82.0kg rescue by the force lifting him during each stage?